Minimum Roof Height For Dormer

A third consideration that will effect the size and shape of the dormer is the minimum ceiling height.

Minimum roof height for dormer.

Express the slope of a metal roof by a ratio which indicates the pitch of the roof. You need to have a roof pitch that gives you at least the height of a window and then some. The ideal scenario is if you can stand upright in the centre of your loft and raise your arm above your head without crunching your hand on the inside of the roof. There are minimum practical requirements for headroom which the designs for your loft conversion must be able to meet.

You need to consider the slope requirements of each panel to determine this minimum slope. This translates into a fall of just under 2 5 on an 8 foot roof. There is no fabrication of roof trusses required. I always recommend at least a minimum pitch of 1 in 40.

The profile is the shape taken by the sheets when you bend them to form panels. Where a property already has a steep pitched roof the eventual loft conversion will be much easier and ideally you are looking for headroom in the loft of around 2 2 to 2 6 meters. Fix your roof deck and you are done. The minimum slope of a roof depends on the roof s profile.

A shallow pitch cannot sustain a dormer window simply because the interior space makes a dormer window impossible. A dormer window therefore is only used with steeper pitches that have a useable interior space in the ceiling area.